Invalid and Shut-ins

Invalid noun - Someone who is incapacitated by a chronic illness or injury.

Shut-ins and invalid are semantically related In some cases you can replace phrase "Shut-ins" with "Invalid", this terms are similar.

Nearby Words: invalidate, invalidated, invalidity, invalided, invalidation

Invalid and shut-ins are semantically related in person being treated for medical problem topic. You can use "Invalid" instead a noun phrase "Shut-ins".